A castle motif is knitted on the front of the pullover or the back of the jacket. It is formed by twisted stitches, “knots” - a weird, confusing sort of bobble, and knit and purl stitches. The ribbing is a twisted rib. The back and most of each sleeve is done in double moss stitch. I used Cascade 220 Superwash, but I think any yarn which gets gauge would work. I made the smallest size and used 4 skeins. If using Aranmore, you’d need 10 - 15 50 gram balls depending upon size. I used size 6 needles for the ribbing and 7 for the rest of the sweater.